Here is the trailer for Toei Doga's second feature film, 1959's Shonen Sarutobi Sasuke, or as it's known in the West, Magic Boy. Ben Ettinger describes:
"Here we find Toei Doga plunging into the realm of the historical fantasy adventure spectacular, and the film is just plain fun to watch, great entertainment with lots of variety and action, but strangely, while it's a step forward from Hakujaden in terms of the animation, it seems to be a step backwards in terms of the content. Apparently this is attributable purely to Toei politics. The original script was transformed at a late stage in production into a simple bad-guy-vs-good-guy story at the behest of Toei execs who wanted to cash in on the popular formula Toei had been putting to use at the time in their live-action jidaigeki movies. There was widespread discontent among the animators because of this."
Embedding was disabled for this clip, so you'll just have to follow the link. Enjoy.